Book Image

C++20 STL Cookbook

By : Bill Weinman
Book Image

C++20 STL Cookbook

By: Bill Weinman

Overview of this book

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible. Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions. By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (13 chapters)

A simple RPN calculator with deque

An RPN (Reverse Polish Notation) calculator is a stack-based calculator that uses postfix notation, where the operator follows the operands. It's commonly used in printing calculators and, notably, the HP 12C, the most popular electronic calculator of all time.

After becoming familiar with its operational modality, many people prefer an RPN calculator. (I've been using the HP 12C and 16C since they were first introduced in the early 1980s.) For example, using conventional algebraic notation, to add 1 and 2 you would type 1 + 2. Using RPN, you would type 1 2 +. The operator comes after the operands.

Using an algebraic calculator, you would need to press an = key to indicate that you want a result. With an RPN calculator this is unnecessary because the operator processes immediately, serving a double purpose. On the other hand, an RPN calculator often requires an Enter keypress to push an operand onto the stack.

We can easily implement...